Questions tagged [unix]

Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.

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What is the difference between hardware and software load balancers?

How does each work? I currently use PerlBal...is that ok? It's just round-robin non-session-based load balancing.
Alex's user avatar
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3 answers
630 views

dmesg log dump help

I keep having dumps in my dmesg logs, I suspect that it's the NIC making errors. Can someone give me their opinion? After this happens, I can't access the machine through the network. [28965.681498] ...
Disco's user avatar
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2 votes
2 answers
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Can someone see why my DNS won't work? I followed everything in the tutorial, but won't work

If anyone can help me troubleshoot this, I would very much appreciate it!! The tests work. It's just that when I do the manual ping/nslookup test, nothing is working. By the way, I followed ...
Alex's user avatar
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1 vote
8 answers
261 views

What script or program is needed to keep a unix system date correct?

What script or program is needed to keep a unix system date correct? I find that my linux servers are behind a few minutes from actual time.
erotsppa's user avatar
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2 votes
2 answers
732 views

How do I get the psuedo terminal device of the current xterm?

I'd like to get the value of the current xterm window's psuedo terminal, for use in the "write" function. For instance, when I type ps I can see that all the current processes are on pts/4. Is there ...
Eyal's user avatar
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2 votes
3 answers
5k views

UNIX password expiration time setting

Where and how exactly I can set the expiration time of password of users i.e.the time after which the UNIX OS prompts user after giving some warnings that your password will expire with in n days and ...
Sachin's user avatar
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2 votes
1 answer
739 views

Unix Joe Editor Default Settings

Using JOE Text Editor I feel rather annoyed having to change the Word Wrap settings everytime I edit a document. I am sure there must be a way to define a set of defaults for the whole system once and ...
clops's user avatar
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3 answers
435 views

How to limit FTP connections to a certain ip range?

I only want to be able to connect to my unix box via ftp from a small range of ips. other services (i.e., www , mail , ssh) should be from any ip as usual how can i set this up? thanks
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1 vote
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How to stop apache showing a page when its ip is requested? I only want to show a page if a domain is requested

i am running apache on (for example) 127.1.1.1, but have it set up so example1.com reads from /home/example1.com/, example2.com reads from /home/example2.com/ if i go to example1.com (or any other ...
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If I set up a DNS server, will I need to buy a domain name from Godaddy?

Suppose I have a server in my network that would like to talk to the database server. How would it talk to the DNS, and then point to the database server?
Alex's user avatar
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4 answers
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When to use DNS for my linux architecture?

I understand that this is a server-fault question, and I will most likely close this after it's answered. But I really need this answer now, and since it's Halloween, serverfault has very few people ...
Alex's user avatar
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2 votes
5 answers
8k views

How to copy /etc/hosts to all my machines?

import os, sys, time servers = ['dev','admin','db1'] for s in servers: cmd = 'scp /etc/hosts regular_user@%s:/etc/hosts' % s print cmd os.system(cmd) I have written this script to copy ...
Alex's user avatar
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52 votes
6 answers
49k views

How to make a global ~/.vimrc?

Right now, I make everyone do ~/.vimrc and put their settings there. How can I make a global, default .vimrc for new users?
Alex's user avatar
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4 votes
3 answers
7k views

Why doesn't "ifconfig" work on some of my machines?

Some do...some don't work. ifconfig -bash: ifconfig: command not found
Alex's user avatar
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11 votes
3 answers
32k views

PYTHONPATH environment variable...how do I make every subdirectory afterwards?

I currently do this: PYTHONPATH=/home/$USER:/home/$USER/respository:/home/$USER/repository/python-stuff How can I make it so that the PYTHONPATH can include everything subdirectory? PYTHONPATH = /...
Alex's user avatar
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0 votes
2 answers
222 views

What are all the most essential things to install for YUM?

I am building a server that has all the libraries (of course, they shouldn't take up Gigs of data). So that I can clone it, and will have it all. This server is mainly for web/crawling/databases ...
Alex's user avatar
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What is the exact YUM to install Java-JDK?

Do I have to put "multiverse" or something...this is what I heard. For CENTOS
Alex's user avatar
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2 votes
4 answers
11k views

Usage of HOSTNAME and CURRENT_USER in scripts on linux

Suppose I want to edit /etc/profile: PYTHONPATH = /home/CURRENT_USER/ How do I have a variable that will automatically fill in the current user? What about hostname? Aren't these environment ...
Alex's user avatar
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5 votes
4 answers
1k views

Log monitoring toolsets for Unix? [closed]

What are some good tools for monitoring logs on a system? I am currently using logsentry, which basically just runs grep on logs, ignores regexps I tell it to ignore, and mails me everything else, but ...
Jack Lloyd's user avatar
17 votes
4 answers
16k views

Where should I place group shared files on a Linux system?

I'm migrating a lot of small custom scripts and data from a Linux system to another. On the old system we had a shared user that owned most of the files and they where located in that users /home, ...
Daniel's user avatar
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2 answers
2k views

How can I edit/update hosts(etc/hosts) file using any programming language [closed]

Dynamically I want to edit/update hosts(etc/hosts) file to add domain. To edit hosts(etc/hosts) file require Admin privileged. Using Linux I can do this by this command sudo gedit /etc/hosts But ...
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2 votes
4 answers
2k views

software for batch process management in unix

I'm looking for a good open source solution to managing many batch jobs across a cluster of machines. I've looked at the solutions indicated in this post but it doesn't really seem to be what I'm ...
rhettg's user avatar
  • 231
3 votes
9 answers
21k views

How can i find out the server specs in unix?

Tried to search but can't find anything. Is there an unix equivalent to right clicking / properties on My Computer to see things like memory, cpu speed etc ?
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3 votes
1 answer
7k views

How do you handle log rolling (or truncation) for unix services that don't handle it themselves?

In my particular case it's the mysql general log and slow query log; neither is critical to operations, just there for troubleshooting if need be, and mysql doesn't have a mechanism for rolling or ...
Teflon Ted's user avatar
0 votes
1 answer
340 views

Installing fortune on Solaris

I'd like to build and install fortune into my home directory on Solaris 10. Can someone recommend a version that's easy to build on Solaris and comes with a good set of fortune files. In reading ...
brianegge's user avatar
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0 votes
1 answer
3k views

How to run a program inside chroot with stdin/stdout available to caller?

Is there a way to run a program in a chroot while still having access to stdin/stdout? My first attempt was a shell script: /usr/local/bin/real-app: -------- #!/bin/bash chroot /var/lib/app-root /...
Mark Renouf's user avatar
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2 votes
4 answers
1k views

Filesystem permissions on Unix

If I have a folder specified as not-readable. Are all folders under it also non-readable? For example, my shared hosting home account directory is not accessible to other accounts, so, are all folders ...
rFactor's user avatar
  • 367
4 votes
2 answers
787 views

Blocking rm -rf for application

I have application which during run-time generates interesting intermediate outputs to ./tmp directory. At the end of execution this directory is deleted. How can I preserve contents of it? I do not ...
user23364's user avatar
  • 145
3 votes
8 answers
21k views

How to completely backup a Linux Image and then load it in another server?

Complete exact copy!
Alex's user avatar
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2 votes
3 answers
15k views

How can I virtualize a Unix machine using VMware?

I have a computer with a Unix OS installed on it. I want to convert this computer to a virtual machine so that I can run it on another computer with VMware workstation.
Alex's user avatar
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1 vote
3 answers
10k views

After I change /etc/apt/sources.list...why doesn't it take effect?

Do I have to restart something? Edit: sudo apt-get update has no effect. When I search this on another machine with the SAME sources.list, it works. But, it still doesn't work on this machine. ...
Alex's user avatar
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2 votes
5 answers
503 views

how to create a cronJob run every 0.25 hour

How do I want to create a cron job on Linux that runs every 0.25 hour?
user avatar
0 votes
3 answers
2k views

Why can't I install Java via "sudo aptitude" in Ubuntu?

$ sudo aptitude install sun-java6-jdk [sudo] password for fal: Reading package lists... Done Building dependency tree Reading state information... Done Reading extended state information Initializing ...
Alex's user avatar
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3 votes
5 answers
68k views

How to check if I successfully installed java?

I went to SUN's website and downloaded the .bin: https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewFilteredProducts-SingleVariationTypeFilter I ran it, ...
Alex's user avatar
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2 votes
5 answers
288 views

How to make desktop notifications from long-running shell commands? [closed]

I'm currently trying to configure sphinxsearch. The indexing takes around 7 minutes. Too long to wait so I usually start doing some other tasks before testing the results. But I would like to be ...
Jakub Troszok's user avatar
0 votes
1 answer
1k views

Why doesn't memcache work?

from django.core.cache import cache def testcache(): cache.set('test','I am putting this message in',3333) print cache.get('test') It just prints "None" This is in "ps aux": ...
Alex's user avatar
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2 votes
3 answers
4k views

Providing command line arguments for an executable through a shell script

Suppose I have an executable xyz that takes a variable number of command-line arguments, and a wrapper Korn shell script xyz.ksh. Is there an easy way to pass all of the shell script arguments as-is ...
An̲̳̳drew's user avatar
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6 votes
2 answers
10k views

What does rm {} + do?

As in find -L /etc/ssl/certs/ -type l -exec rm {} + So it finds all broken symlinks and deletes them. But how exactly do I interpret the {} + part?
yanchenko's user avatar
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2 votes
3 answers
3k views

Cannot install JAVA SDK on UBUNTU

Note: I followed all the instructions here: http://blog.taragana.com/index.php/archive/how-to-download-install-jdk-6/ I went to the java.sun website I ran wget on : Java SE Development Kit 6u16, jdk-...
Alex's user avatar
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4 votes
3 answers
11k views

How to use "wget" to save a file as a different name

wget "http://flakejfl2ke3jrlwkefj38j2ofiwejfoifjalsdkfje3fklwje.exe" is long. How do I save it as my own name?
Alex's user avatar
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12 votes
2 answers
34k views

execute su -c over ssh

I am trying to check the BIOS version of a server over SSH, a command that requires root privileges: ssh remote-server su -c dmidecode but this of course fails with the error: standard in must be ...
aaron's user avatar
  • 751
-1 votes
1 answer
469 views

Cannot add to sudoers file in Ubuntu

1. vim /etc/group 2. Could not find "admin" group 3. adm:x:4:MYUSERNAME << added it here, because I assume this is "admin" 4. quit the vim editor...and tried it under my username...and it DOESNT ...
Alex's user avatar
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0 votes
2 answers
2k views

Memcached will not start

I have this in my /usr/local/: libevent-1.4.so.2 memcached When I do this, it will not start: ./memcached -d -u root -m 3900 -p 11211 ./memcached: error while loading shared libraries: libevent-1....
Alex's user avatar
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1 vote
3 answers
1k views

Why doesn't "locate" work?

I tried "locate libevent", but it doesn't work. and nothing happens.
Alex's user avatar
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1 vote
3 answers
3k views

Is it possible to get Samba automatically convert linebreaks in files from dos to unix?

I have a shared over samba directory which i access from my windows development box. Problem is that when i create and edit files they are saved with dos linebreaks. Is there any way to configure ...
alexeit's user avatar
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0 votes
7 answers
3k views

vi syntax to comment out non-commented lines (cron)

Anyone know if it's possible in vi to replace only uncommented/non-blank lines with comments? If I want to replace a commented line with something I know I can use :%s/^#/##foo##/g -- but I am ...
user avatar
3 votes
4 answers
9k views

Use 'find' to determine files modified yesterday

I'm sure this is an age old question with a simple answer, but I've tried every combination I know to try and haven't come up with anything. And searching Google is less than pleasant since searching ...
Corey S.'s user avatar
  • 2,527
0 votes
5 answers
3k views

Removing files of a specific extension unix

Quick question, how do I recursively remove files of a specific extension? I wish to remove all .svn folders from a project. rm -Rf www/ "*.svn" The above seems to remove everything. Im using ...
user avatar
44 votes
23 answers
71k views

Finding the Public IP address in a shell script

I can find my IP address using ifconfig or hostname -i command. But how do I find my Public IP? (I have a static public IP but I want to find it out using unix command)
shantanuo's user avatar
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13 votes
6 answers
35k views

How do i find out which Fedora version I'm running from the cli (not uname -a)?

I want to know if the box is Fedora Core 4 or Redhat 9, or CentOS, etc... not if it has Kernel 2.6.x
Zak's user avatar
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